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首页> 外文期刊>Ocean science >Storm-induced water dynamics and thermohaline structure at the tidewater Flade Isblink Glacier outlet to theWandel Sea (NE Greenland)
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Storm-induced water dynamics and thermohaline structure at the tidewater Flade Isblink Glacier outlet to theWandel Sea (NE Greenland)

机译：Tidewater Plade Isblink冰川出口到Wandel Sea（Ne Greenland）的风暴诱导的水动力学和热杂岭结构

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摘要

In April 2015, an ice-tethered conductivity-temperature-depth (CTD) profiler and a down-looking acoustic Doppler current profiler (ADCP) were deployed from the landfast ice near the tidewater glacier terminus of the Flade Isblink Glacier in the Wandel Sea, NE Greenland. The 3-week time series showed that water dynamics and the thermohaline structure were modified considerably during a storm event on 22-24 April, when northerly winds exceeded 15 ms(-1). The storm initiated downwelling-like water dynamics characterized by on-shore water transport in the surface (0-40 m) layer and compensating offshore flow at intermediate depths. After the storm, currents reversed in both layers, and the relaxation phase of down-welling lasted similar to 4 days. Although current velocities did not exceed 5 cm s(-1), the enhanced circulation during the storm caused cold turbid intrusions at 75-95 m depth, which are likely attributable to subglacial water from the Flade Isblink Ice Cap. It was also found that the semidiurnal periodicities in the temperature and salinity time series were associated with the lunar semidiurnal tidal flow. The vertical structure of tidal currents corresponded to the first baroclinic mode of the internal tide with a velocity minimum at similar to 40 m. The tidal ellipses rotate in opposite directions above and below this depth and cause a divergence of tidal flow, which was observed to induce semidiurnal internal waves of about 3 m height at the front of the glacier terminus.
机译：2015年4月，冰拴电导率 - 温度（CTD）分析器和下眼的声学多普勒当前分析器（ADCP）从Wandel Sea的潮水冰川冰川的潮水冰川末端附近部署了陆地冰Ne Greenland。 3周的时间序列表明，在4月22日4月22日至44日的风暴事件中，当北风超过15ms（-1）时，水动力学和热卤素结构显着修改。风暴启动了沉船样的水动力学，其特征在于表面（0-40米）层的岸上水输送，并在中间深度补偿离岸流动。在风暴之后，在两层中反转的电流，下降的放松阶段持续到4天。虽然当前速度不超过5cm S（-1），但风暴期间的增强循环引起了75-95米深度的冷浑浊侵入，这可能归因于来自翼片的脱落冰帽。还发现温度和盐度时间序列中的半峰周期与月球半潮流相关。潮流的垂直结构对应于内潮的第一条巴曲线模式，其速度最小类似于40米。潮汐椭圆在该深度上方和低于该深度的相反方向上旋转并导致潮汐流动的分歧，观察到在冰川末端前部诱导约3米高度的半峰内部波。

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